Finding the Fourth Proportional to 10,864.72, 16,288.98 and 6,915.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,864.72 : 16,288.98 = 6,915.16 : x
2. Step 2: Convert to fraction form
   10,864.72/16,288.98 = 6,915.16/x
3. Step 3: Cross multiply
   10,864.72x = 16,288.98 × 6,915.16
4. Step 4: Simplify right side
   10,864.72x = 112,640,902.94
5. Step 5: Solve for x
   x = 112,640,902.94/10,864.72
6. Step 6: Final answer
   x = 10,367.58